DMD

Good morning, it is the first time that I write in this forum. I have to order the Obsidian 450D case, and in the spec it is Maximum CPU Cooler Height 165mm. The problem that the heatsink I have to mount, Noctua NH-D15 SE-AM4 has the same height of 165mm. Does the measurement coincide, is it a risk to mount the heatsink in the case? Sincerely thank you